How to use this tool
Press Start to begin timing, Lap to save a split, and Pause to temporarily stop. Resume without losing elapsed time, or export the lap table as a CSV file.
Quick steps
- Press Start to begin the timer.
- Use Lap to record splits and Pause or Resume to control timing.
- Download the lap times as a CSV file when finished.
Practical tip
This timer uses your device's monotonic performance clock. It will catch up after your tab becomes inactive, but it is not certified timing equipment.
Common questions
Does the stopwatch keep time in a background tab?
The display may pause when your browser throttles inactive tabs, but elapsed time is recalculated from the device clock when the page becomes active.
Can I save my lap times?
Yes. Download lap, split and total elapsed times as a CSV file.
Does the timer continue after closing the page?
No. The state is not saved across page reloads or browser restarts.